Drugs like cocaine and even marijuana and nicotine affect the brainâs natural function. The drug overwhelms the brain with a chemical called dopamine. Dopamine makes the brain and body feel pleasure. When the drug wears off, the dopamine drains out of the userâs system. This makes a person feel that the only way they can feel pleasure is by taking drugs.
March 31, 2015. Apple uses its own signature operating system, which since 2001 has been derived from Unix and known as OS X. Before OS X came OS 9, otherwise known as Classic.. As of June 2014, the latest version of OS X is called Mavericks..
Without getting into a PC vs Apple debate; the main difference between an IBM (PC) and an Apple PC, is the operating system. Apple computers run on Machintosh OSX (older appâ¦les might use an earlier OS version, such as OS9) while IBM PC's will run on Microsoft Windows operating systems, such as Windows Vista, Windows XP or the latest Windows 7. Apple computers generally are more expensive, and at the same time offer reliability.